The default focus makes tour close on Enter
When gnome-tour appeared and I hit Enter, it disappeared, and I was left confused. Did it crash? ... No, it was just that the default button focused is
No Thanks, which closes the tour.
I believe this is a wrong decision. First, gnome-initial-setup is presented right before showing gnome-tour, and the whole initial setup can be traversed just by clicking Enter, Enter, Enter. So then, when gnome-tour pops up, I just click Enter instinctively, because I want to go forward. So gnome-tour's behavior is inconsistent with gnome-initial-setup which is presented right before it. Second, Enter is quite universally used to go forward/confirm, and Escape to go back/cancel. I believe that gnome-tour which make the default selection in such a way that supports this pattern.